Aethue geanyille



(No Model.)

AJGRANVILLBQ HYDRAULIC ELEVATR.

Patented June 20, 1882.l

N. PETERS. Pnnurmhngnpmr. wnningm. n.

. UNITED STATES PATENT OFFICE.

ARTHUR GRANVILLE, OF NEW YORK, N. Y.

HYDRAULIC ELEvAToR.

SPECIFICATION forming part of Letters Patent No. 259,848, dated June 0, 1882.

` Application mea Api 17, 1882. (No model.)

To all whom it may concern:

Be it known that I, ARTHUR GRANVILLE, of the city, county, and State of New York, have invented certain Improvements in Hydraulic Elevators, of which the following is a specification.

This invention relates more particularly to that class of elevators commonly known as sidewalk7 elevators, but may in some cases be applied to other elevators. lts object is to insure the economy of time, labor, and space by the application of certain principles of hydrostatics in connection with the mechanical parts of a machine, and to this end it comprises certain novel combination of parts by which said objects are secured.l

Figure 1 is a'. side view and partial vertical sectional view, showing a hydraulic elevator, embracing certain of the features of my said invention. Fig. 2 is a plan view thereof, and Fig. 3 an end View looking from the rear. Fig. 4 is a detail view showing the parts more immediate] y concerned in operating` the cock or valve of the hydraulic cylinder. Fig. 5 is a plan view and partial horizontal section representing certain other features ot' my said invention.

A is the hydraulic cylinder, .in' which B is.

the pistou and U the piston-rod, the piston being provided with a leather cup-packing or with any other suitable packingaud the pistonrod passing through a similar cup or other packing, A,suitablyprovided in theinner end,

a., of the cylinder, A.

Suitably supported upon the bed-plate D of the apparatus is a spirally-grooved drum, E, to the axis of which is 'fixed a spur-wheel, F, which gears into a spur-pinion, G, upon the shaft b of which is a winding-drum, H, to which the usual hoisting or draft rope or chains of the elevator platform or cage are attached. The draft-rope, together with its attachment to the winding-drum H and the platformor cage, being matters within the common knowledge of Inachinists and mechanical engineers, require no specific description here.

I is a chain or rope, one end of which is attach-ed to the eud c ot' the piston rod C, while the opposite end of said chain or rope is suitably `attached to the drum E in such manner that when the said drum is rotated the chain will wind in and traverse the spiral groove, which extends continuously around said drum from one end toward the other thereof to an extent proportioned to the stroke of the piston,

static pressure-that is to say, the water under pressureis admitted in the ordinary or in any suitable` manner tothe cylinder A between the inner end, a, and the piston B thereof, thereb y tending to force the said piston outward away from the end a of said cylinder. Preparatory to this-that is to say, when the piston B is moved inward to the head a-the chain or rope I is coiled upon the drum E and in the grooves thereof, as hereinbefore eX- plained'.v Such being the position of the parts the outward movement of the piston B, acting through the piston-rod C and chain I, unwinds the said chain from the drum E, and consequently rotates the same, the rotatory motion being transmitted through the spur-wheel F and spur-pinion Gto the winding-drum H, and thence to the draft rope or chains and cage to raise the latter. The reverse or downward movement of the platform or cage is of course secured by the exit of the water in' the usual or any suitable manner from the cylinder rA,

which permits the platform or cage to descend 'f by its own gravity. Under many conditions the apparatus constructed as above may be used without the devices represented in Fig. 5; but in many others thelateral movement of the chain or rope Ias it unwinds from one end of the drum E toward the other will exert too much lateral strain upon the end of the piston-v rojd G, and consequently cause leakage and derangement of the packing; and to obviate this I provide the devices represented in Fig. 5 and constructed as follows:

J is a yoke, one end of which is formed with a female screw, f, which is passed upon a screwthreaded portion, g, provided upon the'end of the piston-rod C. The opposite end of the yoke J is'provided with a knob, h,`which fits into a cavity, i, in the body K of a turn-buckle, the said body K being composed of two longitudinal halves externally threaded and held together by two nuts, m m.

L is a. clevis provided with a knob, n, which fits into a cavity, i', in the adjacent end of the turn-buckle K. The inner side, b', ofthe clevis L is straddled by a link, N, attached to the inner end of the chain or rope I, and provided with a roller, n, which passes through the slot or inside of the clevis L, so as to move freely from one end to the other thereof. This movement of the link N-in other words, of the adjacent end of the chain I-permits the latter to accommodate itself to the grooves of the drum E while winding or unwinding in the said grooves from one end toward the other of the said drum.

The connection ofthe clevis L with the turnbuckle K by means ot' the knob n fitted into the cavity r permits the chain to turn in such manner as to avoid kinking or binding, this being supplemented by a similar action of the turnbuckle with reference to the knob l1. of the yoke J, this also permitting the said yoke J to be turned upon the screw g of the piston-rod (l, in order to tighten or loosen the chain or rope I until it is brought to the requisite tension upon the drum E, by which means the perfect adjustment of the parts is very readily secured.

It is of course to be understood that certain parts may be omitted when it is only desired to provide for the automatic lateral adjustment of the chain or rope I as it is passed from one end to the other of the spirally-grooved drum E; also, that certain other parts may be omitled when it is only desired to provide for adjustin g the tension of the draft rope or chain I in its relation with the drum E and the pistonrod C; but in general it will be found advantageous to use these two features of the invention in connection with each other and as represented in Figs. 1,2, 3, and 4. I provide, further, an arrangement shown in Fig. 2, whereby the pressure is shut od automatically, thus controlling the stroke of the piston or action of the machine when necessary.

Q is a rod, one end of which has a rack, o, gearing into a toothed quadrant, q, which is aiixed to the stem s otl a three-way cock, (shown at A* in Fig. 4,) or a two-port slidevalve or a valve of any other suitable construction, which regulates the flow ofthe water in and out ofthe cylinder A.

Y is an arm extending from near the end of the piston-rod C, and y y are two stops, fixed at proper intervals on the rod Q.

The action of this automatic arrangement ot' parts is as follows: When the stroke is nearly ended, as shown in Figs. l and 2, the arm Y will strike against the stop y, inoving forward the rack o, gearing into quadrant q, turning the three-way cock bythe stem S, and thus shutting o the induction of water and arresting the stroke and stopping the machine. The same action takes place when the arm Y shall strike the stop y', which will pull back the rod Q, rack fn, gearing into quadrant q,which will turn the stem of the cock the reverse way, closing the port and arresting the machine by stopping the outflow from the cylinder A of the eduction water. f

What I claim as my invention is- 1. A hydraulic elevator having as its essential parts the cylinder A, piston B, piston-rod C, chain or rope I, spirally-grooved drum E, spur-wheel F, spur-pinion G, and hoistingdrum II, the whole constructed and combined for joint use and operation substantially as and for the purpose herein set forth.

` 2. The combination, with the rod Cof the piston B, the cylinder A, chain or rope I, and Spirallygrooved drum E, of the yoke J and turn-buckle K, having the nuts m, all substantially as and for the purpose herein set forth.

3. The combination of the clevis L and link N and roller u with the piston-rod C, the chain or rope I, the spirally-grooved drum E, the piston B, and cylinder A, all substantiallyv as and for the purpose herein set forth.

4. The rod Q, having the rack o, the arm Y, attached to the piston-rod (l, and toothed sector g, in combination with the cock or valve of the cylinder A, chain I, and winding mechanism, snbstantially as described, for operation in connection with the said mechanism, all substantially as and for the purpose herein set forth.

ARTHUR GRANVILLE.

Witnesses:

CHAs. I. BLINN, ROBERT W. Mn'r'rnnws. 

